JPH052081A - Radiation dose equivalent rate level display and its level signal transmitter/receiver - Google Patents

Abstract

PURPOSE:To detect radiation level immediately in a work environment of radiation and display the integral exposure dose of a worker at the site by providing a main equipment for displaying the radiation dose equivalent rate level and transmitting the level signal, and providing a worker with a pocket equipment for receiving a level signal and displaying it together with the historical data of the worker. CONSTITUTION:When no worker is in the facility where a main equipment is installed, power is supplied only to the circuit relating to a human body detection means 3 and it always operates to monitor the approach of a worker. Once the means 3 detects a worker, a switch 2 is turned on, the whole circuit of the main equipment goes into stand-by, and a radiation detector means 6 also starts to operate. By inputting the radiation detection count from the detector means 6, necessary processing calculation is executed by an arithmetic means 11. The calculated result is sent to a pocket equipment by an information transmission means 5 and controlled display 13. On a display element group 8 for displaying radiation dose equivalent rate level, display elements according to the level are turned on. On a display, digital value is indicated. To a warning sentence display 9, a sentence to show the abnormally high radiation dose equivalent rate is sent.

Description

Detailed Description of the Invention

[0001]

This invention relates to the detection of the presence or absence of radiation and the measurement and measurement of the amount of radiation in the industries such as nuclear industry, radiation medicine, nondestructive inspection, synchrotron radiation facilities, and other industries and research institutions that use radioactive materials. The present invention relates to a radiation dose equivalent rate level display of a display method and a level signal transmission / reception device thereof.

[0002]

2. Description of the Related Art Conventionally, when detecting or measuring radiation, a technology that has been conventionally adopted is a reading type pocket dosimeter using a radiation sensitive semiconductor or a small GM counter, or a wall hanging using a liquid crystal character display or LED. Various types of dose rate display panels have been put to practical use. Further, an element in which a scintillator and a radiation sensitive semiconductor are combined has also been put into practical use.

[0003]

However, in these conventional radiation detection and measurement methods and their display methods, the radiation dose equivalent rate (μSv / Hr) is generally used and the direct exposure dose of the worker is displayed. is not. The exposure dose must be processed by using a pocket dosimeter with another integrating calculator, and therefore the exposure dose cannot be confirmed on site. Moreover, since the radiation dose equivalent rate is expressed by a numerical value, it is necessary for the operator to consider whether it is relatively high or low.

The present invention has been made in view of the above circumstances, and can detect the radiation level immediately and easily in a radiation work environment, and the cumulative exposure dose of the worker on the spot. In addition to displaying the warning text on the display, if necessary,
Radiation dose equivalent rate level display and its level that is capable of issuing a warning by sound and transmitting various information appealing to the human five senses An object is to provide a signal transmitting / receiving device.

[Means for Solving the Problems]

To achieve the above object, the present invention provides
Detects radiation, displays the radiation dose equivalent rate level, etc., receives the level signal, etc., and the main device (A) that transmits the level signal, etc., and displays it including the previous data of the worker. At least one worker mobile device (B)
And the main device (A) and the portable device (B)
Are characterized by having the following configurations, respectively.

Here, the main device (A) is directly connected to the battery power source (1) and the main power switch (2) and the battery power source (1) and always operates to detect the approaching human body. A human body detection means (3) for turning on the power switch (2), a radiation detection means (6), and an operation means (11) for performing a predetermined processing operation by a detection signal from the radiation detection means (6). ,
Information transmission means (5) for transmitting the data resulting from the calculation means (11) to an electromagnetic wave and transmitting it to the portable device (B) of the worker, the radiation dose equivalent rate display (7) and its level are displayed stepwise. Level display element group (8), the warning text display (9) relating to the radiation, and the display pattern memory device (12) for the display
According to the calculation result from the calculation means (11), select a display pattern from the display pattern memory device (12),
It is composed of the radiation dose equivalent rate display (7), the display element group (8) for displaying its level, and display control means (13) for sequentially outputting to the warning text display (9), respectively. .

On the other hand, the portable device (B) has an information receiving means (91) for data relating to radiation, a timer (92) which starts from 0 upon reception thereof, and an operator ID information memory ROM (9).
4), information receiving means (91), ID information memory ROM (94) and timer (92), arithmetic means (93) for performing a predetermined processing arithmetic operation
Radiation dose equivalent rate indicator (98) and its level indicator (9
7), the integrated dose equivalent display (99), and their display pattern memory ROM (96), and a display pattern is selected from the display pattern memory ROM (96) according to the calculation result from the calculation means (93). , Radiation dose equivalent rate indicator (98),
Its level indicator (97) and accumulated dose equivalent indicator (99)
And a display control means (95) for outputting to.

Further, in the above configuration of the present invention, near infrared rays may be used as an electromagnetic wave for transmitting data regarding radiation from the main device A to the portable device B.

[0009]

With the above structure, the following is obtained. Referring to FIG. 1 and FIG. 2, the first worker is installed in a facility in which the main equipment A of the radiation dose equivalent rate level display of the present invention and its level signal transmitter / receiver (hereinafter abbreviated as display and transmitter / receiver) is installed. In the unattended state, the main device A supplies power only to the circuit related to the human body detecting means 3 which is directly connected to the battery power source 1 and operates, and constantly monitors the approach of the worker. In this state, the main power switch 2 of the main device A is turned off, so that the power consumption is kept to the minimum necessary. When the worker approaches and the human body detecting means 3 detects it, the main power switch 2 is turned on for the first time, and the entire circuit including the micro computer of the main equipment A enters the operating state. In addition, the radiation detecting means 6 is activated. RO of Microcomputer
The calculation means 11 according to the program written in M inputs the radiation detection number from the radiation detection means 6 to perform necessary processing calculation.

The data of the calculation result is the information transmitting means 5
The information is transmitted to the portable device B of the display / transmission / reception device owned by the operator.

The display control means 13 according to the program written in the ROM sends the display patterns and data signals corresponding to the respective display elements and displays.
In the radiation dose equivalent rate level display element group 8, display elements corresponding to the level amount are turned on (may blink). Display elements below that level are also turned on. That is, the number of elements that light up increases as the level increases. Therefore,
At high levels, many elements are illuminated. EL for display element
(Electro Luminescent Light) may be adopted and the emission color may be changed according to the level. Low power consumption. The radiation dose equivalent rate display 7 is displayed as a digital value. Since an LCD (liquid crystal device) can be used for this digital display, power consumption is low. Warning text display
Send the text to 9 when the radiation dose equivalent rate is abnormally high. At the same time, a warning by an electronic voice speaker may be used together.

Therefore, the main equipment A of the display and transmission / reception device
Can operate stably for a long time with a small-capacity battery power source. Further, it facilitates setting and changing of display symbols, brightness and blinking.
In addition, it is possible to install a lightweight and compact device by eliminating the need for power cable wiring.

On the other hand, in the portable device B of the display and transmission / reception device that each worker has, the micro computer starts operating when the battery power of the portable device B is turned on. Once in the operating state, the serial data received from the main device A is always converted into parallel data according to the interrupt program written in the ROM of the mobile device B,
It is temporarily stored in the RAM of the mobile device B.

Near infrared rays or the like may be used as the electromagnetic wave transmitted from the main device A to the portable device B. However, in the case of near-infrared rays, etc., it cannot be received in the shadow of an object or a human body, so it is received at a position where it can be seen.

The value of the allowable maximum dose equivalent N _MAX is stored in the ROM in advance, and the ratio of the exposure history N _ID of the individual worker to N _MAX is displayed on the liquid crystal display. (When the ratio is 1, the entire surface of the display is made opaque, and only the area corresponding to the ratio is made opaque.) The radiation dose equivalent rate r in the work environment at the time T _i stored in the RAM by interruption upon reception.
First, the value of r _i is digitally displayed on the liquid crystal display from _i and the integrated dose equivalent N _i . Next, the value of r _i is leveled in several stages. The liquid crystal display is divided into a number of leveled areas, and the liquid crystal area corresponding to the value of r _i is turned on. Furthermore,
The value of N _i is also displayed continuously as the value of N _ID as a ratio to N _MAX . If the sum of N _ID / N _MAX and N _i / N _MAX is 1
When it exceeds, a blinking signal is sent to the display to warn. Further, a warning sound may be emitted.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the following display and transmission / reception apparatus of the present invention will be described with reference to FIGS. Here, FIG. 3 is an example of the main device A, and FIG. 4 is an example of the portable device B. 5 is an external perspective view of the main device A, and FIG. 6 is an external perspective view of the mobile device B. In FIG. 3, reference numeral 20 denotes a basic part of the microcomputer, and CPU21, R
It is composed of AM22 and ROM23. The ROM 23 has a program (which will be described later) for controlling the microcomputer, and the CPU 21 follows the memory device 25 according to the program.
The data necessary for the radiation dose processing and calculation is read through the and interface circuits 27 and 29, and the previous detection result temporarily recorded in the RAM23 is also included to calculate the data necessary for the output of the display. I do.

The operation result is the interface circuit 30, 31, 33, 3
It is output to the transmission circuit 53 and the display element group 61 and the display devices 63 and 65 through 5. Further, the data required for the calculation of the next detection result is temporarily recorded in the RAM 23. These circuits are connected by a bus 36 for data, address and control lines. The main power switch 42 is set to the OFF state until the operator approaches the main equipment A of the display and transmission / reception device. Therefore, except for the human body detection circuit 43, all circuits including the micro computer and Power is not supplied to the detector and display. Only the human body detection circuit 43 is a dedicated switch SW (always O
Since it is directly connected to the battery power source through N), the approach of the human body is constantly monitored.

When the worker approaches the main equipment A, the infrared sensor 44 detects the infrared rays emitted from the human body. Since the energy from the human body is weak, infrared rays are collected by a reflector or plastic lens to improve the sensitivity. Since it is a differential type sensor, a chopper mechanism is installed in front of the sensor. The opening / closing frequency of the chopper is about 1 Hz. The signal output is amplified by the amplifier 45, and this output voltage is compared with the reference voltage determined to approach the human body by the comparator 46. Only when the output voltage is higher than the reference voltage, the S terminal of the RS flip-flop circuit 40 is passed through the timer circuit 47. To the O terminal from the Q terminal
Output from the signal of N, turn on the relay drive circuit 41,
The main power switch 42 is turned on. The timer circuit 47 outputs the unstable output for about 2 minutes after the human body detection circuit 43 is turned on.
As for, I try not to send an unstable signal. When the relay is driven by the set signal of the flip-flop circuit 40 and the main power switch 42 is in the ON state, the Q terminal of the flip-flop circuit 40 remains in the ON state even if the signal from the human body detection circuit 43 is turned OFF. Main power switch 42 so keep
Keeps ON. To turn off the main power switch 42, a reset signal may be sent from the interface circuit 27 to the R terminal of the flip-flop circuit 40. The ON signal from the human body detection circuit 43 is sent to the interface circuit 27 of the microcomputer at the same time. Main power is ON
Next, when all the microcomputers and the like are activated, the microcomputer first reads the ON signal from the human body detection circuit 43 again according to the program in the ROM 23 to check the human body, and then operates according to a predetermined program described later. to go into.

The memory device 25 includes a display element group 61 and a display device 6.
Stores the display pattern when outputting a value to 3,65.
This memory device may be a hard disk, a ROM, or the like.
The interface circuit 29 reads the pulse detected by the radiation detection circuit 50 into the pulse counter 51, and reads the number n _i thereof at predetermined time intervals according to a program.

The serial interface circuit 30 converts parallel data relating to radiation in the micro computer to the portable device B by an asynchronous transmission method in which it is converted into serial data in 1-byte units and a start bit and a stop bit are added before and after the serial data. Try to send. This serial signal is sent to the transmission circuit 53. In the transmission circuit 53,
Carrier frequency by the carrier generator 56 (about 38k
H _Z ) is modulated by the modulator 55 with the serial signal. The modulated signal is sent to the transmitter 57 to pulse-drive the near infrared light emitting diode (wavelength 940 nm). The forward current of the diode at this time is selected to be about 300 mA.
Although it depends on the sensitivity of the light receiving unit of the portable device B, the maximum reach distance is about 10 m and the directivity angle is about 90 degrees.

The interface circuit 31 outputs a lighting signal to one of the four EL display element groups of the radiation dose equivalent rate level display element group 61 which is suitable for the operation level.
The interface circuit 33 outputs the radiation dose equivalent rate r _i and its display pattern to the display 63. Interface circuit
When the value of r _i suddenly increases, 35 outputs the warning sentence and its display pattern to the display unit 65.

FIG. 5 is an external perspective view of the main device A installed on the wall 152. Secured to wall 152 with mounting flange 150. The mounting flange 150 has an L-shaped metal pipe 151
Is connected and the equipment part is housed in the cylindrical part 100 fixed on it. The cylindrical part 100 has a height of 200 mm and a diameter of 10
The size is about 0 mm. A detection circuit / transmission circuit such as a micro computer and a display are housed in this. Radiation dose equivalent rate level display element group 61 is cylindrical portion 100
Four rows of EL element groups are sequentially arranged on the surface of from the bottom along the circumference, and the letters ∇, L, M, and H are lit from the bottom. Each row consists of 6 ELs, which blink or light up as follows. 1. When the dose equivalent rate level is 1 μSv / H or less, the element group 101 blinks. When the dose equivalent rate level is 1 to 30 μSv / H, the element groups 101 to 102 blink. 3. When the dose equivalent rate level is 30 to 100 μSv / H, the element groups 101 to 103 blink. When the dose equivalent rate level is 100 μSv / H or more, the element groups 101 to 104 blink, where the elements 101 to 102 blink green, 103 blinks orange, and 104 blinks red. Further, 18 LCDs are arranged on the circumference of the LCD to form a warning text display 65. An LCD of a radiation dose equivalent rate display 63 is arranged above the cylindrical portion 100. Further, an infrared sensor 44 is arranged on the cylindrical portion 10
Near-infrared transmitter 57 is arranged below 0.

Next, the operation of the main device A will be described with reference to the programs shown in FIGS. When the main power supply is turned on by the ON signal from the human body detection circuit 43, the microcomputer starts its operation and sequentially reads the program instructions written in the ROM 23 to start the execution as shown in FIG. First, after sending an initialization command to an interface circuit or the like, in step (a), the O from the human body detection circuit 43 is sent.
The N computer sends an interface circuit 27 to the signal.
Enter from and check again. Here, the human body detection is judged as absent when the number of ON signals falls below a predetermined fixed value within a fixed time. In this case, a reset signal is sent to the flip-flop circuit 40 to turn off the main power supply. In step (b), it reads the internal timer time Konpyuta the first round of detection start time T _o, resets the radiation detection pulse counter 51 to zero at the same time. In step (c), a predetermined minimum value Δ of radiation detection time for each time
t _o, i.e., it reads the minimum interval Delta] t _o the detection time of the (previously set to about minutes) from a predetermined address of ROM23 the CPU21 registers. The check address of the detection time i of the RAM 22 is set to 1 as the first time.
In step (d), the internal timer time T _i is read.
Here, i is the detection number, and when the series of work relating to the radiation detection of one time up to FIG. 6 is completed, the detection number i is increased by one and the process returns to the beginning of step (d). In step (e), the time Δt _i from the previous detection time T _i-1 , that is, if (T _i −T _i-1 ) is less than Δt _o , the process returns to the beginning of step (d) Δt _o time Once exceeded, T _i time and Δ
t _i time is determined, proceed to the next step.

In step (f), the radiation detection number n _i during the Δt _i time is read from the pulse counter 51 through the interface circuit 29 and reset to 0, and the next radiation detection i-th calculation is performed. (Here, α is a coefficient for converting the number of output pulses into the dose equivalent rate). Number of radiation detections per unit time n _i / Δt _i 2. Radiation dose equivalent rate r _i = αn _i / Δt _i 3. Cumulative radiation dose equivalent N _i = r _i Δt _i + N _{i-1 The} above result is stored in the RAM 22 as data of T _i time.

In step (g), the values of the radiation dose equivalent rate r _i are respectively passed through the interface circuit 33,
Output to the LCD display 63. At this time, the CPU 21 refers to the display pattern from the display pattern memory device 25.

At step (h), as shown in FIG.
The value of radiation dose equivalent rate r _i of the _i time, flashing the predetermined element group of the four-level EL display element group. The blinking condition of each of these element groups can be easily changed by rewriting the ROM 23. In particular, when r _i exceeds a predetermined value, a warning sentence is output to the display unit 65.

In step (K), the value of r _i temporarily stored in the RAM 22 and its leveled value and N _i
The value of is output to the serial interface circuit 30 and transmitted. At the step (K), the human body detection signal is interfaced.
Check whether the input is continued through the circuit 27. If it has not continued, a reset signal is sent to the flip-flop circuit 40 to turn off the main power switch 42. In step (S), the detection count i is incremented by 1
Return to the beginning of, and enter the next detection round.

On the other hand, one embodiment of the portable device B will be described with reference to FIG. The equipment B turns on the power switch 70 of each equipment B when each worker carries it and enters the work room. CPU71
Starts its operation according to the program written in the ROM 73. At the same time, the timer 88 is turned on, and the time can be read through the interface circuit 87 at any time.

The near infrared ray transmitted from the main device A is received by the receiving unit 89.
It is received by the photodiode of. Amplifier this signal
After amplification / detection / waveform shaping at 80, the timing corrector 79 and shift register 78 convert serial data into parallel data and send it to the interface circuit 76 through the data decoder 77. The interface circuit 76 reads the data in units of 1 byte and temporarily stores it in the RAM 72.

Values corresponding to the dose equivalent rate level indicator 82, dose equivalent rate indicator 84, and dose equivalent indicator 86 and display patterns are sent to the dose equivalent rate indicator 86 through interface circuits 81, 83, 85, respectively.

FIG. 6 is a perspective view of the portable device B according to an embodiment.
This is a wristwatch type, but it may be a card type attached to the chest or a pendant type. In this cylinder 400, a CPU 401, a ROM 403 in which the worker's N _ID is recorded, a RAM 402 in which the work room N _i is recorded, a receiving circuit 404, a timer 405, and an interface circuit 406 for receiving and displaying are housed. This cylinder 400
Above this is a ring-shaped liquid crystal display 200 with a dose equivalent rate level and a liquid crystal digital display 250 with a dose equivalent rate in the center. Further, a circular ring type liquid crystal display 300 having a dose equivalent is arranged thereon.

The dose equivalent rate level indicator 200 is as follows. 1. When r _i is 1 or less, only the annular region 201 becomes opaque. 2. When r _i is 1 to 30, only the annular region 202 becomes opaque. 3. When r _i is 30 to 100, only the annular region 203 becomes opaque. When r _i is 100 or more, the dose equivalent display 300 in which only the annular region 204 becomes opaque is as follows. 1. N _ID spreads in the circumferential direction in proportion to the size like the fan-shaped region 301. 2. N _i spreads in the circumferential direction in proportion to the size of the fan-shaped area 302.

Next, the operation of the portable device B will be described with reference to the programs shown in FIGS. Before entering the work room, the operator turns on the power of the device B so that the light receiving part of the device B is located at a position where the near infrared rays transmitted from the device A can be directly viewed. After the microcomputer starts its operation and performs initialization, the process proceeds as follows. In step (na), the maximum dose equivalent N allowed from ROM 73
Read _MAX and the previous dose equivalent N _ID of the worker and calculate the ratio X, that is, N _ID / N _MAX . Step (d)
Then, when X is 1, the central angle of the fan-shaped region is set to 360 degrees (it becomes an annular shape), and the fan-shaped central angle corresponding to the value of X is displayed opaquely.

At the step (nu), it is checked whether or not it is received from the main device A. Specifically, it is checked whether the next reception address in the RAM 72 is 1 or 0. (A series of data from the main device A at the i-th detection time is interrupted byte by byte, and is stored in a predetermined address of the RAM 72 according to the interrupt program, and 1 is set to the address indicating that the i-th detection time has been received. Record it.Send a reset signal to the timer 88 at the same time.) If not received, check the time of the timer 88, that is, the time from the previous reception. If it exceeds the predetermined time, a warning sound is emitted and if it is within the predetermined time, It returns to step (nu) as it is. Here, when the alarm sounds, it is necessary to direct the light receiving portion to the main device A.

In step (n), the level values of the reception data r _i , N _i and r _i read in the RAM 72 are read out and the reception address is set to 0. In step (no), r _i is displayed on the digital display 84 through the interface circuit 83. In step (No), the value obtained by leveling r _i in four steps is displayed on the liquid crystal display 82 through the interface circuit 81.

[0036] In step (c), to calculate the value of the ratio Y i.e. N _i / N _MAX for N _MAX of cumulative dose equivalent N _i of the working chamber, whether the value of X + Y is greater than the 1. 1
If it is larger than N _MAX, a warning sound is emitted and the entire surface of the liquid crystal display 86 is blinked through the interface circuit 85. If it is less than 1, the value of Y is displayed on the display 86. In either case, return to step (nu) and repeat the same. Although near infrared rays are used as electromagnetic waves in the embodiments, ultrasonic waves may be used instead of electromagnetic waves.

[0037]

As described above, according to the radiation dose equivalent rate level display and its level signal transmitting / receiving apparatus of the present invention, the following effects can be obtained. The main equipment A installed in the radiation work environment displays the radiation dose equivalent rate and its value in several steps at predetermined intervals and displays them on the LCD display, especially when the dose equivalent rate exceeds the predetermined value. Displays a warning sentence. Further, since the EL display element groups of different colors are turned on in accordance with the level, it becomes easier to detect the radiation level of the worker in the field than in the conventional case. The worker portable device B is transmitted from the main device A. The previous exposure dose of the individual worker is added to the cumulative exposure dose for each detection, and it is displayed together with the radiation level in a pie chart on the liquid crystal display. If the exposure dose exceeds the specified range, the entire surface of the liquid crystal display blinks. You can warn the individual worker with a sound or sound and appeal to the five senses of the human being to draw more attention than before.

[Brief description of drawings]

FIG. 1 is a part of a main device A in a claim correspondence diagram of the present invention.

FIG. 2 is a part of the portable device B in the claim correspondence diagram of the present invention.

FIG. 3 is a part of a main device A according to an embodiment of the present invention.

FIG. 4 is a part of a mobile device B according to an embodiment of the present invention.

FIG. 5 is a part of the main equipment A in a perspective view of an embodiment of the present invention.

FIG. 6 is a part of the portable device B in a perspective view of an embodiment of the present invention.

FIG. 7 is a program written in a ROM of the main device A according to the embodiment of the present invention.

8 is a continuation of the program of FIG.

FIG. 9 is a program written in a ROM of the mobile device B according to the embodiment of the present invention.

FIG. 10 is a continuation of the program of FIG.

[Explanation of symbols]

A main device B portable device 1 battery power supply 2, 42 main power switch 3 human body detection means 4 SW (switch) 5 information transmission means 6 radiation detection means 7, 63, 84, 250 radiation dose equivalent rate indicator 8, 61 radiation dose Equivalent rate level display element group 9,65 Warning sentence display 11 Calculation means 12, 25 Display pattern memory device 13 Display control means 20 Microcomputer basic unit 21, 71, 401 CPU 22, 72, 402 RAM 23, 73 , 403 ROM 27, 29, 31, 33, 35 interface circuit 76, 81, 83, 85, 87, 406 interface circuit 30 serial interface circuit 36 data, address, control line bus 40 flip-flop circuit 41 relay drive circuit 43 human body detection circuit 44 infrared sensor 45, 80 amplifier 46 comparator -Timer circuit 50 Radiation detection circuit 51 Pulse counter 53 Transmitter circuit 55 Modulator 56 Carrier generator 57 Transmitter unit 70 Power switch 74 of device B 74,404 Receive circuit 77 Data decoder 78 Shift register 79 Timing generator 82 Device B Dose equivalent rate level indicator 86 Dose equivalent indicator 88 of equipment B 88,405 Timer 89 Receiver 100 Cylindrical part 101 ∇ character display element group 102 L character display element group 103 M character display element group 104 H character display Element group 150 Mounting flange 151 L-shaped metal pipe 152 Working room wall 200 Dose equivalence rate level annular liquid crystal display (divided into the following four areas) 201 r _{i The} innermost circumference that is opaque when r _i is 1 or less the second annular portion 203 r _i from the inside to the opaque when the annular part 202 r _i is 1 to 30 30 to 1 00 is opaque when the third annular portion 204 r _i from the inner side is opaque when 100 or more is the outermost annular portion 300 An annular liquid crystal display device 301 with a dose equivalent to the N _ID value of the operator Corresponding opaque region 302 Opaque region corresponding to the value of N _{i in} the working chamber 400 Clock cylinder frame 500 of device B Support band of device B

Claims (2)

[Claims] 1. A main device (A) that detects radiation, displays the radiation dose equivalent rate level, etc., and transmits the level signal, etc., and receives the level signal, etc. A radiation dose equivalent, comprising at least one worker mobile device (B) for displaying data, wherein the main device (A) and the mobile device (B) are configured as shown below. A rate level display and its level signal transmitting / receiving device. Main equipment (A) is a battery power supply (1)
And a main power switch (2), and a human body detection means (3) that is directly connected to the battery power source (1) and always operates, and turns on the main power switch (2) when an approaching human body is detected,
Radiation detection means (6) and calculation means (11) for performing a predetermined processing calculation based on detection signals from the radiation detection means (6)
And information transmission means (5) for transmitting the data resulting from the calculation means (11) to electromagnetic waves and transmitting it to the portable device (B) of the worker,
Radiation dose equivalent rate display (7), level display element group (8) for displaying the level stepwise, display for warning text regarding radiation (9), and display pattern memory device of the display
(12) and the display for displaying the radiation dose equivalent rate display (7) and its level by selecting a display pattern from the display pattern memory device (12) according to the calculation result from the calculation means (11). Element group (8) and indicator for the warning text (9)
And a display control means (13) for sequentially outputting to each. The portable device (B) includes an information receiving means (91) for radiation-related data, a timer (92) which starts from 0 upon reception thereof, an operator ID information memory ROM (94), an information receiving means (91), A calculation means (93) for performing a predetermined processing calculation from the ID information memory ROM (94) and the timer (92), a radiation dose equivalent rate display (98), its level display (97), and an integrated dose equivalent display (99). ) And their display pattern memory ROM (96) and a display pattern is selected from the display pattern memory ROM (96) according to the calculation result from the calculation means (93), and a radiation dose equivalent rate indicator (98) , Its level indicator (97), and indicator control means (95) for output to the integrated dose equivalent indicator (99). 2. The main device (A) to the portable device (B)
The radiation dose equivalent rate level display and its level signal transmitting / receiving apparatus according to claim 1, wherein the electromagnetic wave for transmitting the radiation-related data is a near infrared ray.